【GeoTools】JTS几何关系判断
GeoTools JTS的几何关系判断
maven:
org.locationtech.jts
jts-core
1.16.1
| 几何关系 | |
|---|---|
| 相等（equals） | |
| 脱节（disjoint） | |
| 相交（intersects） | |
| 接触（touches） | |
| 交叉（crosses） | |
| 内含（within） | |
| 包含（contains） | |
| 覆盖（overlaps） |
- 相等（equals）
/**
* 判断两个几何图形是否相等
* @throws ParseException
*/
public void equals() throws ParseException {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((113.5052490234375 34.397844946449865, 114.03259277343749 34.397844946449865, 114.03259277343749 34.82507742547058, 113.5052490234375 34.82507742547058, 113.5052490234375 34.397844946449865))";
// String wktPolygon2 = "POLYGON ((113.5052490234375 34.397844946449865, 114.03259277343749 34.397844946449865, 114.03259277343749 34.82507742547058, 113.5052490234375 34.82507742547058, 113.5052490234375 34.397844946449865))";
String wktPolygon2 = "POLYGON ((114.345703125 33.8521697014074, 115.257568359375 33.8521697014074, 115.257568359375 34.53371242139564, 114.345703125 34.53371242139564, 114.345703125 33.8521697014074))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.equals(read2));
}
输出结果为false，当两个图形的坐标完全相同时输出true
图形：
2. 脱节（disjoint）
/**
* 判断两个几何图形是否不相交
* @throws Exception
*/
public void disjoint() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((113.5052490234375 34.397844946449865, 114.03259277343749 34.397844946449865, 114.03259277343749 34.82507742547058, 113.5052490234375 34.82507742547058, 113.5052490234375 34.397844946449865))";
String wktPolygon2 = "POLYGON ((114.345703125 33.8521697014074, 115.257568359375 33.8521697014074, 115.257568359375 34.53371242139564, 114.345703125 34.53371242139564, 114.345703125 33.8521697014074))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.disjoint(read2));
}
输出true，说明两个图形没有相交
图形：
- 相交
/**
* 判断两个几何图形是否相交(和脱节刚好相反)
* @throws Exception
*/
public void intersects() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((114.345703125 33.8521697014074, 115.257568359375 33.8521697014074, 115.257568359375 34.53371242139564, 114.345703125 34.53371242139564, 114.345703125 33.8521697014074))";
String wktPolygon2 = "POLYGON ((114.85107421875 33.57343808567733, 115.60913085937499 33.57343808567733, 115.60913085937499 34.134541681937364, 114.85107421875 34.134541681937364, 114.85107421875 33.57343808567733))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.intersects(read2));
}
输出true，说明连个图形相交了
图形：
- 接触（touches）
/**
* 判断几何体是否接触（边界是否有共同的点或边界线）
* @throws Exception
*/
public void touches() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((115.6087875366211 33.11282400421533, 116.1416244506836 33.11282400421533, 116.1416244506836 33.57172177544194, 115.60913085937499 33.57343808567733, 115.6087875366211 33.11282400421533))";
String wktPolygon2 = "POLYGON ((114.85107421875 33.57343808567733, 115.60913085937499 33.57343808567733, 115.60913085937499 34.134541681937364, 114.85107421875 34.134541681937364, 114.85107421875 33.57343808567733))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.touches(read2));
}
输出为true，两个图形的边界的点或线的坐标一样，并且图形内部没有公共的点。使用intersects方法输出也为true，和intersects不同的是touches只允许两个图形的边界点有公共点，不允许内部有公共点。
图形：
下面这种图形输出也为ture，但是Geometry对象不能同时为线（可以是线，但是结果为false），只能是面和面、面和线进行判断。（没有测试点）
- 交叉（crosses）
/**
* 判断几何图形是否交叉（穿过）
* @throws Exception
*/
public void crosses() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "LINESTRING (115.90164184570312 33.18123802491263, 116.08840942382812 33.005208549965474, 116.43447875976561 33.16284622181141)";
String wktPolygon2 = "LINESTRING (115.82748413085936 33.042629907076225, 116.08840942382812 33.005208549965474, 116.38710021972655 33.00981511270531)";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.crosses(read2));
}
输出为true，intersects方法输出也为true，但是和intersects不同的是如果两个Geometry 都为面时crosses输出为false。一个为面，一个为线的两个Geometry交叉时crosses输出也为ture。
图形：
下面这种图形crosses输出为true，但是Geometry对象不能同时为面（可以是面，但是结果为false），只能是线和线、面和线进行判断。（没有测试点）
- 内含（within）
/**
* 内含
* @throws Exception
*/
public void within() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((112.87353515625 31.970803930433096, 114.45556640625 31.970803930433096, 114.45556640625 33.30298618122413, 112.87353515625 33.30298618122413, 112.87353515625 31.970803930433096))";
String wktPolygon2 = "POLYGON ((111.357421875 30.95876857077987, 115.90576171874999 30.95876857077987, 115.90576171874999 34.361576287484176, 111.357421875 34.361576287484176, 111.357421875 30.95876857077987))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.within(read2));
}
输出true，如图，A图形内含在B图形里。
图片：
- 包含（contains）
/**
* 包含
* @throws Exception
*/
public void contains() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((112.87353515625 31.970803930433096, 114.45556640625 31.970803930433096, 114.45556640625 33.30298618122413, 112.87353515625 33.30298618122413, 112.87353515625 31.970803930433096))";
String wktPolygon2 = "POLYGON ((111.357421875 30.95876857077987, 115.90576171874999 30.95876857077987, 115.90576171874999 34.361576287484176, 111.357421875 34.361576287484176, 111.357421875 30.95876857077987))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read2.contains(read1));
}
输出为true，如图，B图形包含A图形，和内含刚好相反。
图形：
- 覆盖（overlaps）
/**
* 覆盖
* @throws Exception
*/
public void overlaps() throws Exception {
WKTReader reader = new WKTReader();
String wktPolygon1 = "POLYGON ((111.357421875 30.95876857077987, 115.90576171874999 30.95876857077987, 115.90576171874999 34.361576287484176, 111.357421875 34.361576287484176, 111.357421875 30.95876857077987))";
String wktPolygon2 = "POLYGON ((114.75219726562499 30.420256142845158, 117.72949218749999 30.420256142845158, 117.72949218749999 32.58384932565662, 114.75219726562499 32.58384932565662, 114.75219726562499 30.420256142845158))";
Geometry read1 = reader.read(wktPolygon1);
Geometry read2 = reader.read(wktPolygon2);
System.out.println(read1.overlaps(read2));
}
输出为true，两个几何图形必须有公共的点但不是所有的点。就是说两个图形要有相交的部分，也要有不相交的部分。和intersects方法不同的是当两个图形的一个点或者边界相交时，输出为false。
图形：
